The FDA Reviewed 7 Popular Peptides. Six Made the Cut.

Khloé Kardashian takes a daily peptide injection. Hailey Bieber uses copper peptides. Joe Rogan credits one with fixing an injury that dogged him for years, and Andrew Huberman has described using another for his back. Across fitness social media, recovery stories arrive daily, usually with a discount code to an online seller tucked in the bio.

Last week, a federal advisory panel took its first serious look at seven of these peptides and recommended six of them. To be clear, this does not mean FDA approval, and none of the seven is an approved drug. What the panel recommended is that they move onto the list of substances licensed pharmacies are allowed to compound, which is the part that changes where you would actually get one.

Here is how they got here, the seven themselves, and how much evidence is behind them.

Peptides Aren’t New. So Why Is Everyone Suddenly Talking About Them?

Peptides are not new. Insulin has been one since the 1920s. What changed is that the GLP-1 drugs turned a peptide into a household name, and the curiosity did not stop at weight loss. The longevity scene had been interested in the rest of the category for years, and in 2025 it started to spill out of the biohacking forums into the public conversation, resulting in what Bloomberg has called a billion-dollar peptides gold rush.

Dr. Ellen Marmur, a board-certified dermatologist at Marmur Medical in New York, puts it plainly:

The appeal is obvious: your body already makes these molecules, so maybe a little more could help a shoulder heal or sleep come easier.

It is fair to notice who gets them first. The people talking about peptides tend to have a concierge doctor and a budget, which can look like access the rest of us are being kept from.

The explanation is simpler than that. Compounded drugs are prescribed at a physician’s discretion, so the people already working with doctors in this space are simply the first to be offered them.

The One Thing That Actually Makes Peptides Different From Most Drugs

The difference is what they are made of. A peptide is a short chain of amino acids, the same class of molecule the body already uses to carry instructions between cells: repair this tissue, wind down for sleep, release this hormone. Insulin is a peptide. So are the GLP-1 drugs that changed diabetes care and weight loss.

That is the real distinction. Most conventional drugs introduce an outside chemical to force an effect. A peptide therapy adds to a signal the body is already sending.

That same quality is what makes peptides hard to study. When a treatment adjusts a system already in motion, the effects can be subtle, personal, and difficult to capture in a standard trial. It is a real scientific frontier moving faster in the culture than the evidence can follow.

One clarification before the list: these are not the peptides in your skincare. Copper peptides, the ones Hailey Bieber mentioned and the ones on the serum labels in your bathroom, are a separate and well-understood category. The seven below are compounded drugs, mixed to order by a pharmacy rather than manufactured and approved as a finished product, and they are injected.

The Seven Peptides Under Review, and What Each One Really Does

We’ll start with three worth knowing in more detail.

BPC-157 is the one that made the category famous, after Joe Rogan credited it with clearing an elbow injury he had carried for years. Its origin story is a saga of its own, chased by a single Croatian researcher across five decades, and its first registered human trial was withdrawn before it produced anything reviewable.

Semax is the quiet outlier. It has been an approved prescription drug in Russia since the 1990s — decades of genuine human use — even though it has never been tested to the standard the FDA applies at home. It is the best-documented of the seven, and almost nobody in the current conversation mentions it.

Epitalon is attached to the most-quoted number in the category. The striking longevity statistic comes from studies of epithalamin, a related natural extract, rather than the synthetic peptide people are actually injecting. Worth knowing before you see it cited again.

Here is the full breakdown:

The Panel Cleared Six Peptides. One Failed, for a Reason Worth Knowing

Over two days in late July, a federal advisory committee reviewed all seven. It recommended that six be added to the list of substances pharmacies may legally compound, holding out only on DSIP.

It wasn’t rejected for weaker evidence. DSIP has more human research behind it than several of the ones that passed. The difference is what it was being reviewed for: opioid and alcohol withdrawal, which any regulator treats far more carefully than sleep or recovery.

The sharper concern in the review was not the science. It was the market and the promotion around it. Names are not standardized, so the same label can mean different material from different sellers. TB-500, for example, is sold under that name by dozens of sellers with no shared definition of what is in the vial, and injectables are made to wildly different standards.

So Should You Actually Try One?

Peptides are one of the more interesting areas in health right now, because they work with systems the body already runs rather than overriding them. Some of what is being sold may prove out as the research matures, and some may not.

Which brings it back to sourcing. Anyone can sell you a peptide. Far fewer will run your labs first, source it through a licensed pharmacy instead of the gray market, and stay with you after the first injection.

Scott Galloway, the NYU business professor who co-hosts the Pivot podcast, set the same bar for himself in July while discussing the peptide boom on the show. He was speaking about hormone therapy rather than peptides, but he applies the same rule to both: he has never done any of it without medical supervision, “meaning I have my blood drawn all the time.”

That kind of care mostly sits with high-service clinics and practices today. As the category matures, it should reach many more patients than that.

If you are going to explore this, do it somewhere that treats it as medicine — somewhere that knows your history and builds a plan around your goals rather than handing you a vial. That difference is worth holding out for. This is your health.

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